Hoisting apparatus.



No. 772.005. PATENTED OCT. 11, 1904.

' A. SUNDH & D. L. LINDQUIST.

HOISTING APPARATUS. APPLICATION FILED mu. 4. 1904. no menu. 2 sums-sum 1.

FIG-.2.

: INVENTORS ATTORNEY No. 772,005. PATENTED OCT. 11, 1904. A. SUNDH & 1). L. LINDQUIST.

N0 MODEL.

UNITED STATES Patented October 11, 1904.

PATENT 1 OFFICE.

AUGUST SUNDH AND DAVID L. LINDQUIST, OF YONKERS, NEIV YORK, ASSIGNORS TO OTIS ELEVA"OR COMPANY, OF EAST ORANGE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 772,005, dated October 11, 1904.

Application filed January 4, 190 1,

To all whom it may concern:

Be it known that we, AUGUST SUNDH and DAVID L. LINDQUIST, of Yonkers, Westchester county, New York, have invented a new and useful Improvement in Hoisting Appa-- ratus, of which the following is a specification.

The invention relates to hoisting apparatus; and it consists in the construction and arrangement of the loose rotary hoisting-drum and frictional devices for actuating the same, and also of the brake mechanism wherebybrakeshoes acting upon the motor-shaft and upon the hoisting-drum periphery are simultaneously applied.

In the accompanying drawings, Figure 1 is an elevation showing our hoisting apparatus in cross-section on the line 1 1 of Fig. 4, together with the counterweight, cable, and car. Fig. 2 is a cross-section on the line 2 2 of Fig. I viewed in the direction of the arrow 3. Fig. 3 is a cross-section showing a modified form of the device in which the friction-pulleys O P Q R are supported in sliding bearings instead of on swinging arms. Fig. i is a side elevation. Fig. 5 is a plan. Fig. 6 isa crosssection on the line 6 6 of Fig. 4.

Similar letters and numbers of reference indicate like parts.

A is the bed of the machine.

B is an electric motor supported on standards C. The motor-shaft D is journaled in standards E F. Fast upon the shaft D is an elongated pulley H, which pulley is located between the standards E F. Pivoted to the bed are four upwardly-extending swinging arms I J K L. Between the upper ends of the arms J L on one side and the upper ends of the arms I K on the other side extend shafts M N. Each shaft M N carries two pulleys P R and O Q. Surrounding all four pulleys is a loose ring S, which forms the hoistingdrum, the middle portionT of which is of less diameter than the outer flanged portions and receives the hoisting-cable U, which passes over the fixed pulleys V, Fig. 1, and has the car W and counterweight X attached to its ends. The motor-shaft pulley H lies between and in frictional contact with the pulleys O P Serial N5. 187,676. (No model.)

and Q, R. The pulleys O P and Q R are also in frictional contact with the inner periphery of the hoisting-drum ring S. The ring S is supported below on rollers Y on the shafts G of swinging arms I J and K L. The strain on the cable U being upward and the ring S being loose, the inner periphery of the ring is forced with a pressure depending upon the magnitude of the load on said cable against the pulleys O P and Q R, and these pulleys in turn, because 7 mounted on the swinging arms I J K L, transfer this pressure to opposite sides of the motor-shaft pulley H. \Vhen the motor B is operated by current conducted through the leading-in wires a, circuit being closed through the hand-switch b, the rotation of pulley H is communicated to pulleys O P and Q, R and so to the ring S, which then operates after the usual manner of a hoistingdrum to raise and lower the car N in accordance with the direction of rotation.

With this novel form of hoisting apparatus we provide the brake mechanism now to be described. Loose upon the motor-shaft D is a plate 7, preponderating at its lower portion and provided on one side with a projecting drum 8, Which drum is concentric with shaft D. On the opposite side of plate 7, facing the motor and above the shaft D, are brackets 9, (see Fig. 6,) which support a solenoid 10. Two cores 11 enter said solenoid, passing through openings in said brackets, and are pivoted to the upper ends of lovers 12. Said levers have their fulcrums 13 upon the plate 7 and below said fulcrums carry pivoted brake-shoes 12 which bear upon the periphery of disk 4, which is fast on the motor-shaft D. The lower ends of levers 12 are connected by a helical spring 14, which is provided with an adjusting bolt and nut 15, by which its tension may be regulated.

On each side of the bed A are fixed journals which receive short shafts 16. Loose on each shaft are double arms 17, to which is pivoted a brake-shoe 18, which bears on the periphery of ring S. Fast on each shaft 16 between the double arms 17 is an arm 19, having an up turned outer extremity 20. The double arms 17 have a projection 21 extending over arm 19, and a pin 22 extends downwardly from said projection 21 and through arm 19 when it is set up with a nut. Surrounding pin 22 and interposed between projection 21 and arm 19 is a helical spring 23. Also fast on each shaft 16 is an arm 24, having a horizontally-placed upper extremity. Above the extremities of arms 24, Fig. 2, is a yoke-piece 25, having pins which extend down through both arms 24:, and between said arms and the heads of said pins helical springs are interposed. On the under side of the yoke-piece 25 is an eye to which are attached the ends of a chain 28. Said chain passes through fairleaders 29 on the bed A and around the drum 8 on plate 7.

The solenoid 10 is connected by wires 0 in shunt with the main conductors a.

The operation of the machine is as follows: Assuming at the outset brake-shoes 12"" to be in contact with the disk 4, circuit is established through the motor by hand-switch 6. Solenoid 10 thus being energized draws in its cores, and so turns levers 12 on their fulcrums 13 to separate their lower ends, and thus withdraw the brake-shoes 12* from the periphery of disk 4. The plate 7 being loose on the motor-shaft D, takes by gravity a vertical position, and hence there is no strain on either part of chain 28 acting to apply the brakeshoes 18 to the periphery of ring S. When it is desired to stop the motor and simultane ously apply all the brakes, circuit is broken at the hand-switch b. The spring 14L then draws together the lower ends of levers 12, so applying the brake-shoes 12* to the disk 4. As the disk 4: is fast on the shaft D, it carries the brake-shoes 12" with it over a part of a revolution, thereby tilting the plate 7 and so winding one part of the chain 28 upon the drum 8. The chain 28 then pulls downward the yoke-piece 25 and so the arms 24:, thus rocking both shafts 16 and causing the arms 19 thereon to press upward against the springs 23 until the extremities 20 of said arms 19 meet the projections 21 on the double arms 17, thus tilting said arms 17 and causing them to carry the brake-shoes 18 into contact with the periphery of ring S. It will be evident that the springs 23, as well as the springs on the pins of yoke-piece 25, operate to prevent shock of the moving parts when the brakes are applied or released.

Instead of supporting the friction-pulleys O P Q R upon swinging arms we may arrange them in laterally-sliding bearings 30, Fig. 3, in fixed standards 31. The rollers Y are then journaled in said standards, as indicated in dotted lines in said Fig 3.

We claim 1. The combination of a supporting-bed, a loose annular hoisting-drum thereon, two pulleys within said drum in frictional contact with its inner periphery below the axial center, swinging supports for said pulleys pivoted on said bed, and a driving-pulley between and in contact with said pulleys.

2. The combination with a hoisting-cable of a loose annular drum receiving said cable on its periphery, two roller-supports below the same, two pulleys within said drum and in frictional contact with its inner periphery below the axial center, and a driving-pulley between and in contact with said pulleys.

3. The combination of a loose annular hoisting-drum, two pulleys within said drum in frictional contact with its inner periphery below the axial center and movable toward and from said periphery, and a driving-pulley between and in contact with said pulleys.

4:. The combination of a rotary shaft, a hoisting-drum, friction-gearing between said shaft and said drum, a brake acting on said drum, a brake acting on said shaft and means for simultaneously controlling both brakes.

5. The combination of a rotary shaft, a hoisting-drum, friction-gearing between said shaft and said drum, a brake acting on said shaft, a brake acting on said drum and means for controlling the application of said drum-brake by the action of said shaft-brake.

6. The combination of a motor, a rotary shaft, a hoisting-drum, friction-gearing between said shaft and said drum, a brake acting on said drum, a brake acting on said shaft, and means for simultaneously releasing both brakes when power is admitted to said motor.

7 The combination of a motor, a rotary shaft, a hoisting-drum, friction-gearing between said shaft and said drum, a brake acting on said drum, a brake movable in arc acting on said shaft and means for applying said drum-brake operated by the movement in arc of said shaft-brake.

8. The combination of a rotary shaft, a hoisting-drum driven thereby, a brake constructed to act on said drum-periphery, a brake-disk fast on said shaft, a brake acting on said disk, a supportfor said last-named brake loose on said shaft, and means for operating said drum-brake controlled by the displacement of said support in are due to the frictional contact of the brake thereon with said brake-disk.

9. The combination of a rotary shaft, a hoisting-drum driven thereby, a brake constructed to act on said drum periphery, a brake-disk fast on said shaft, a brake acting on said disk, a support for said brake loose on said shaft, means for electromagnetically operating said disk-brake carried by said support and means for operating said drum-brake controlled by the displacement of said support in are due to the frictional contact of the brake thereon with said brake-disk.

10. The combination of a rotary shaft, a plate loose thereon, a solenoid on said plate, a brake-disk on said shaft, levers pivoted on said plate and controlled by said solenoid, brakes acting on said disk and controlled by said levers, a rotary hoisting-drum, brakes acting on said drum and means controlled by the displacement of said plate in are for moving said drum-brakes into operating position, substantially as described.

11. The combination of a rotary shaft, a loose annular hoisting-drum surrounding the same, a support for said drum, friction-gears between said shaft and the inner periphery of said drum, a brake acting on the outer periphery of said drum, a brake-disk fast on said shaft, a brake acting on said disk and means for simultaneously applying said brakes to said disk and said drum.

12. The combination of a motor, a rotary shaft, a loose annular hoisting-d rum surrounding said shaft, a support for said drum, friction-gears between said shaft and the inner periphery of said drum, a brake acting on the outer periphery of said drum, a brake-disk fast on said shaft, a brake acting on said disk and means for simultaneously applying said brakes to said drum and said disk constructed and arranged to operate when power is cut 0 from said motor.

13. The combination of a rotary shaft, a loose annular hoisting-drum actuated thereby, a disk fast on said shaft, a brake constructed to be moved into contact with said disk and to be displaced in arc by the rotations thereof, a brake constructed to act on the outer periphery of said drum and means for moving said last-named brake into frictional contact with said drum operated by the displacement in arc of said first-named brake.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

AUGUST SUNDH. DAVID L. LINDQUIST.

Witnesses:

Wu. H. SIEGMAN, I. A. VAN WART. 

